Door extractor



I. D. THOMAS DOOR EXTHACTOR Filed March l4 1925 3 Sheets-Sheet 1A.- W w 4W Aug. 13, 1929. l. D. THOMAS 1,724,861

DOOR EXTRACTOR Fined March 14, 1925 s Sheets-Sheet s Patented Aug. 13, 1929.

'IVOR D. THOMAS, OF'PALMYRA, OHIO, ASSIGNOR TO THE WELLMAN-SEAVER-MOBGAN COMPANY, or CLEVELAND, omo, A CORPORATION or OHIO.

DOOR EXTRACTOR.

Application filed 'March 14, 1925. SeriatNo. 15,533.

g This invention relates to door extractors and particularly to machines adapted to travel along the front of a-battery of coke ovens and provided with means for removing and replacing the doors at the ends of the ovenchambers. These doors are very heavy,

weighing in some cases as much as five thousand pounds and are held tightly in the door casin s bythe clay used as a seal between the ct gas of the doors and the sidesof the door casings. In removing the doors it is necessary to free the doors from their casings and to move them laterally out of the door. openings. I

The present invention has for an object to provide a mechanism capable of engaging and removing the doors quickly and with a minimum expenditure of power. I

A further object is to provide a machine in which the door lifting member by asingle actuation may be caused to engage the door, tilt the same outwardly to free the door from the sides of the casing and then by a continued movement to lift the door off the sill and support the same entirely free of the door casing so that the door carrying part of the machine may be backed away from a door opening. I

A further object is to provide a yielding buffer which forms a support for the door lifter and which when brought intoengagement with the door positions the lifter directly beneath the projecting member on the door so that when actuated the lifter will engage with the projection on the door and further to so mount the lifter with respect to the door, the yielding buffer and the actuatin means, that upon engagement of the lifter with the door there will be a resultantoutward thrust thereon which will tilt the door outwardly before the door is lifted.

\Vith the above and other objects in view the invention may be said to comprise the door extracting mechanism as'disclosed in the accompanying drawings hereinafter described and particularly set forth in the appended claims, together with such variations and modifications thereof as will be apparent to one skilled in the art to which the invention appertains. I

Reference should be had to the accom panying drawings forming a part of this specification in which Fig. 1 is a vertical section through an oven door showingthe door engaging portion of the extractor in side elevation; Fig. 2 is a front elevation of the door engaging portion of the extractor; Fig. 3 is a top plan view showing a doorand the extractor in engagementwith the door; F ig.-4 is a section taken on line 44 of Fig. 1;Fig. 5 is a section taken on line 5 5 of Fig. 1; Fig. 6 is a View similar to Fig. 1 showing the door in the position to which it is moved after being stripped from'its casing prior to the operation of the ram.

Referring to the accompanying drawings, the door casing in which the door is mounted is indicated by the numeral 1 and the door mounted in the casing by the numeral 2. The door 2 is provided upon the outer side with outwardly projecting brackets 3 adjacent the top thereof and a second pair of brackets 4 below the brackets 3. The brackets 3 and 4 being provided with upwardly extending inclined slots 5 and 6 in which are slidably mounted cross rods 7 and 8. The cross rods 7 and 8 areada ted to be engaged by lifting hooks of the cliior extractor and are made vertically movable in the slots 5 and 6 to permit themto actuate the retaining latches, the latches being retracted by upward movement of the rods 7 and 8 when the same are engaged by the hooks of the ex tractor. The latch releasing feature is well known in the art, forms no part of the pres: ent invention and is not illustrated herein. 7 e The door extractor mechanism is preferably mounted on a car 9 which may be mounted to travel on a track extendingalong the front of the ovens and the door engaging devices are carried by a ram 10 which is mounted for'movement transversely of the car 9 toward and from the door opening, the ram 10 being provided with a rack 11 and moved back and forth by means of a pinion 12 engaging the rack 11. Upon the forward end of the ram.10 there is fixed a vertical housing 13 which-extends upwardly from the ram and is provided with a forwardly extending portion 14 which projects beyond the end of the ram. The door engaging members are suspended from the forwardly projecting portion 14 and housed between side walls 15 of the housing 13 which project beyond the forward end of the ram 10. Suspended from the overhanging portion 14 of the housing is a door engagmg member 16 in the which is suspended from the housing by a link 17 rm of a casting the portion 14 of which is connected at its lower end to the casting 16 by a horizontal pivot parallel to the plane of the door and at its upper end to the projecting portion 14 of the head by a pivoteparallel to the first mentioned pivot. The casting 16 is provided at its upper end with a forwardly projecting pressure arm 18 which is adapted to engage the door adjacent the 7 upper brackets 3 and at its lower end with a projecting pressure arm 19 which is adapted to engage the face of the door below the brackets 4. The lower pressure arm 19 normally projects slightly further toward the door than the arm 18 by reason of the fact that compression springs 20 are interposed between the lower portion of the suspended casting l6 and the ram, the springs 20 serving to hold the lower end of thecasting 16 outwardly so that the arm 19 projects beyond the arm 18 and will engage with the door prior to the engagement of the arm 18 with the door. The springs 20 are mounted side by side upon rods 21 which are pivoted at their rear ends on horizontal pivot pins 22 on the front end of the ram and are slidable through cylindrical blocks 23 journaled in side walls of apertures 24 formed in the casting 16, the coil springs 20 being interposed 7 between rotatably mounted blocks 23 and washers 25 secured upon the rear ends of the rods. The pivotal mounting of the rods 21 and the rotatable mounting of the blocks 23 permit the casting 16 to have swinging movements with respect to its support, the outward movement of thecasting being limited by stop nuts 26 on the forward ends of the rods 21. When the ram is moved forwardly toward the door, the pressure arm 19 will first engage, the door compressing the springs 20 and causing the upper end of the casting to swing forwardly bringing the upper pressureearms 18 in engagement with the door,

further movement of the ram being cush ioned by the compression springs 20. The

casting 16 has an outwardly and upwardly projecting portion 27 at'its upper end upon which-is pivoted a bell crank lever 28 which has an arm 29'eXtending forwardly toward the'door and provided with a hook 30 at the forward end thereof which is engageable with the'cross rod 7, the other arm 31 of the bell crank extending upwardly from the pivot and having its upper end pivotally connected to a rearwardly extending link 32 the rear-end of which is pivotally connected to a lever 33 pivoted intermediate "its ends within the housing 13. The lever 33 is mounted in substantially upright position and has'its lower end connected by a link 34 with the opposite sides of'a nut 35 which is mounted to travel along a horizontal screw 36 which extends parallel with the ram 10, the screw 36 being operated through reduction gearing 37 by an electric motor 38 mountedon the ram. While the lifter arm 29 serves as the door tilter and lifter, it may be connected by a vertical connecting rod 39' with a lower latch actuating arm 40 which is pivoted to the lower portion of the casting 16 and provided with a hook 41 at the forward end thereof to engage with the cross rod 8 carried by the lower brackets 4. The movement of the casting'16 with respect to the ram 10 is limited by abutments'42 and 43, one carried by the housing 13 and engageable with the upper end of the casting 16 and the other secured to the forward end of the ram 10 and engageable with the lower end of the casting 16.

Inthe operation of the machine the ram 10 will be moved forwardly by means of the pinion 12 until both upper and lower pressure arms 18 and 19 have been brought into engagement with the door 2. When so positioned the hooks 30, and 41 of the arms 29 and 40 will be directly beneath the rods 7 and 8. The motor 38 will then be started into operation causing the nut 35 to travel forwardly on the screw 36 swinging the lever 33 about its pivot, moving the upper end thereof outwardly away from the door and causing the arm 29 of the bell crank and the arm 40 to swing upwardly, lifting the rods 7 and 8 to the upper ends of theirslots. \Vhen the upper rod 7 has reached the upper end of its slot, continued movement of the lever 33 will cause an upward thrust to be exerted upon the door but by reason of the fact that the lever 28 is carried by the bodily movable casting 16, the resultant thrust in an outward direction will cause the upward movement of the arm 29 to cease while the bell crank 28 and the upper end of the casting 16 are moved bodily in an outward direc tion until the upper end of the casting 16 strikes against the upper abutment 42 pulling the upper end of the door outwardly and freeing the door from the sides and top of the casing. As soon as the outward movement of the bell crank28 is arrested continued movement of the lever 33 will cause further movement of the bell crank 28 about its pivot whereby the weight of the door 2 will be taken from the sill and the door entirely freed from the ,door casing so that the ram 10 may be backed away from the door opening carrying the door with it.

In replacing the doors in the door casings the ram will be positioned in front of the door opening and moved forwardlytoward the door opening until the lower edge of the door is directly over the sill of the door casing. The motor 38 will then be operated in a direction opposite that in which it is operated for extracting the door, causing the nut 35 to travel rearwardly along the screw 36 and swinging the upper end of the lever 33 forwardly toward the door opening. The forward movement of the upper end of the lever 33 and of the arm 31 of the bell crank 38 will cause the arm 29 to swing downwardly lowering the door until the lower edge thereof engages with the sill. As the weight of the door is taken off of the arm 29, the outward thrust on the pivot of the bell crank 28 will be relieved and the casting 16 will be returned to upright position by the compression springs 20 causing pressure to be exerted upon the upper portion of the door through the pressure arms 18, tilting the door to upright position in'the opening.

Having described my invention, I claim:

1. A door extracting mechanism comprising a support adapted to be positioned in front of a door to be extracted, a door engaging member mounted on the support for movement in an upward direction to engage with the door and for bodily movement in an outward direction to tilt the door, an actuating device mounted on the support independently of the said door engaging means, and means connecting said device to said door engaging means to move the same upwardly into engagement with the door and through the reaction of the engaging memher with the door to exert an outward thrust on said member to tilt the door.

2. A door extracting mechanism comprising a support adapted to be positioned in front of a door to be extracted, door engag ing means mounted for bodily movement on the support toward and from the door opening, said means having a vertically movable door engaging part and an outwardly movable actuating part through which upward thrust is transmitted to the first mentioned part, and means for exerting a thrust in an outward direction upon said last mentioned part whereby the resistance to upward movement of the first mentioned part will cause the engaging means to be moved outwardly to tilt the door.

3. A door extracting mechanism comprising a support adapted to be positioned in front of a door to be extracted, actuating means on the support, and door engaging means interposed between the actuating means and door for transmitting an upward thrust from the actuating means to the door, said door engaging means being mounted for bodily movement with respect to the actuating means and toward and from the door and said actuating means exerting a thrust in an outward direction on the said door ongaging means to move the same outwardly when upward movement thereof is resisted.

4. A door extracting mechanism comprising a support adapted to be positioned in front of a door to be extracted, a floating door lifting member mounted on said support, said member having a vertical movement with respect to the support and a movement with respect to the support toward and from the door opening, and operating means on the support operatively connected to the door lifting member to impart the said vertical movement thereto, said operating means being so connected to the lifting member as to exert .a thrust upon said member in an outward direction and acting to shift the same outwardly when vertical movement thereof is resisted.

5. A door extracting mechanism comprising a support adapted to be positioned in front of a door to be extracted, a vertically swinging door lifting lever mounted on said support and shiftable bodily thereon toward and from the door opening, and operating means mounted on the support independently of the lever connected to the lever for simultaneously transmitting an upward thrust through the lever to the door and an outward thrust upon the lever to shift the same outwardly.

(3. A door extracting mechanism comprising a support adapted to be positioned in front of a door to be extracted, door engaging means mounted for upward and outward movement on said support, operating means so connected to said engaging means as to cause the same to exert a lifting thrust upon the door and by the thrust bet-ween the door and engaging means and between the engaging means and operating means to cause the engaging means to be moved outwardly to tilt the door.

7. A door extracting mechanism comprising a support adapted to be positioned in front of a doorto be extracted, a yieldable thrust receiving member carried by said support and movable on the support toward and from the door opening, actuating means mounted on the support independently of the yieldable member and having a part movable toward and from the door opening, door engaging means having a vertically movable door engaging part and a part connected'to the movable part of the actuating means, said door engaging means being movable with the yieldable member and having a part engaging the yieldable member through which the thrust of the actuating means is converted into upward thrust on the door engaging part and an outward thrust on the yielding member.

8. A door extracting mechanism comprising a support adapted to be positioned in front of a door to be extracted, a member yielda-bly mounted on the support for limited movement away from the door opening, means for limiting the outward movement of said member, a door engaging abutment carried by said member, a bell crank pivoted on said member, one arm of said bell crank extending forward from the pivot and engageable with the door and the other arm of the bell crank extending upwardly from the pivot, and means for exerting an outward thrust on said last mentioned arm to cause the first mentioned arm to exert an upward thrust on the door.

9. A door extracting mechanism comprising a support adapted to be positioned in front of a door opening, a ram carried by the support and adapted to be moved toward and from the door opening and having an upright member secured to the forward end.

' of and an arm extending upwardly from the pivot, and means carried by the ram and connected to said last mentioned arm for exerting a thrust thereon in a direction away from the door openin 10. A door extracting mechanism comprising a support adapted to be positioned in front of a door opening, a ram carried by the support and movable toward and from the door opening, a yieldable member at the forward end of the ram, said member having a door engaging abutment engageable with the door adjacent the lower end there of, a supporting link connected at its upper end by a horizontal pivot to the ram and at its lower endby a parallel pivot to said member, a spring interposed between said member and ram, a door lifter carried by said member and engageable with the upper portion of the door, and actuating means on the ram connected to said lifter.

11. A door extractor comprising a support adapted to be positioned in front of a door opening, a member carried by the sup port and movable toward and from the door opening, a yielding door engaging buffer carried by said member and engageable with the door adjacent the lower end thereof, a door lifting member movably supported on the buffer and having a hook engageable with the upper part of the door, and means for actuating the lifting member to exert an outward pull thereon to tilt the upper end of the door outwardly to free the same from its casing and an upward thrust upon the door'to lift the same when freed from its casing.

12. A door extractor comprising a support adapted to be positioned in front of adoor opening, a member carried by the support and movable toward and-from the door open ing, a door engaging lever carried by said member, said lever being movable ona horizontal pivot and having a bodily movement with respect to said member toward and away from the door opening, and a single actuating means connected to said lever to move the same about its pivot into engagement with the door, shift the same bodily to pull the door outwardly and to again move the lever about its pivot to lift the door.

18. A door extracting mechanism comprisinga support adapted to be positioned in front of a door to be extracted, a member carried by said support and movable toward and from the opening, door engaging means carried by said member, and engageable with the upper part of a door, said engaging means having a vertical movement for exerting a lifting thrust upon the door and a movement bodily toward and from the door opening independent of the movement of said member and a single actuating means for said door engaging means for imparting thereto in succession a vertical movement to engage the same with the door, an outward movement to free the top portion of the door from the casing and a vertical movement to take the weight of the door from theoven structure. r a

In testimony whereof, I hereunto aflix my signature.

IVOR D. THOMAS. 

